SURFACE SUBSIDENCE BY REPEATED UNDERMINING AND HIGH SPEEDS OF COAL FACE ADVANCE
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- Category: Mining
- Last Updated on 01 October 2014
- Published on 01 October 2014
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A.S. Kuchin, S.F. Leonov, Ye.V. Stelmashchuk, A.P. Shvets, L.A. Kovalevich
The results of surface subsidence monitoring at the observation station which is established above 124th lava of Blagodatnaya mine in the Western Donbass coal region are presented in the article. The speed of mining face advance is 170 m a month in conditions of repeated undermining on a depth of 335 m. Co-ordinates of benchmarks were determined by means of electronic tacheometer during the observations of their displacement. The considerable difference of the actual and forecast surface subsidence and deformations, which is 200%, is set as the result of supervisions.
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